| Valve Type | Inner Valve Type | 
| Impact Frequency | 400-800bpm | 
| Suitable Carriers | 6-9t | 
            
                One-piece bracket design, simple structure, hollows on both sides of the bracket for easy maintenance, low cost, widely used domestically. Often used for excavation and mining.
| Valve Type | Inner Valve Type | 
| Impact Frequency | 400-800bpm | 
| Suitable Carriers | 6-9t |